12215582280 has 96 divisors (see below), whose sum is σ = 43309805760. Its totient is φ = 2961352320.

The previous prime is 12215582273. The next prime is 12215582299. The reversal of 12215582280 is 8228551221.

12215582280 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 558 + 22 + 80 = 666.

12215582280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1538412 + ... + 1546331.

It is an arithmetic number, because the mean of its divisors is an integer number (451143810).

Almost surely, 2^12215582280 is an apocalyptic number.

12215582280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12215582280 is an abundant number, since it is smaller than the sum of its proper divisors (31094223480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12215582280 is a wasteful number, since it uses less digits than its factorization.

12215582280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084771 (or 3084764 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

It can be divided in two parts, 12215 and 582280, that added together give a palindrome (594495).

The spelling of 12215582280 in words is "twelve billion, two hundred fifteen million, five hundred eighty-two thousand, two hundred eighty".